Modelo 600 shows up whenever several heirs inherit a flat, a shop or a plot of land that cannot be split without losing value, and one of them keeps it all in exchange for paying the others their share in cash. It’s common among siblings who live in different countries — the United States, the United Kingdom, Ireland — and who, when an inheritance includes property in Spain, would rather cash out their share than share the management of a home none of them will ever live in together. The deal is formalised before a Spanish notary and, before it can be registered, someone has to self-assess the tax that applies to it.
If the inherited asset is indivisible and the heir who keeps it compensates the others in cash, the deal is taxed under Modelo 600 as Stamp Duty (Actos Jurídicos Documentados, AJD) — between 0.5% and 1.5% of the value, depending on the Spanish region — rather than as a sale subject to Transfer Tax (ITP).
Modelo 600 and the Extinction of Co-ownership
When a will or a declaration of heirs leaves a property in the hands of several siblings in equal shares, a co-ownership is born: everyone owns all of it, nobody owns a physical slice. While that arrangement lasts, any decision about the shared property — renting it out, renovating it, selling it — needs everyone’s agreement, and that gets complicated when some heirs live in Spain and others in Miami, London or Dublin, each on a different schedule and a different time zone.
Extinguishing the co-ownership breaks that deadlock: one heir keeps the whole asset and pays the others the value of their share, usually in cash. That is a separate step from the inheritance itself — which was already settled with Modelo 650 — and it has its own paperwork: Modelo 600, the national form, with regional variants, used to self-assess the Transfer Tax and Stamp Duty Act (Impuesto sobre Transmisiones Patrimoniales y Actos Jurídicos Documentados).
When an Excess Allotment Doesn’t Pay Transfer Tax
Spain’s tax authority calls this difference an “exceso de adjudicación” — an excess allotment: the gap between what an heir is entitled to by their share and what they actually receive by keeping the whole asset. The general rule would treat that excess as a purchase of the other heirs’ shares, with Transfer Tax rates that run roughly between 6% and 11% depending on the region. Article 1062 of the Spanish Civil Code avoids that outcome when the asset is indivisible, or loses significant value if split, and the heir who keeps it compensates the others in cash.
An excess allotment exists when, on dividing an inheritance, one heir receives an asset worth more than their share and compensates that difference in cash to the others.
What Makes an Inherited Flat Indivisible Among Siblings
A three-bedroom flat inherited by three siblings is the textbook case: splitting it physically makes no sense, and selling it to a stranger just to split the proceeds isn’t what anyone wants if one sibling would rather keep it. Say the flat is valued at €300,000. If one sibling takes it all, they owe each of the other two €100,000 in cash.
That payment isn’t treated as buying their share — it is the only way to divide something that cannot be divided in kind. The same applies to a family business or a small rural plot: what matters is whether splitting it destroys real value, not simply whether splitting it would be inconvenient for everyone involved.
Cash Compensation vs Handing Over Another Asset
The tax break under Article 1062 only works when the compensation is paid in cash. Taking on a mortgage debt secured against the asset counts as paying in cash; handing over a different asset instead does not fall within that exception.
When the Compensation Is Taxed as a Transfer
If, instead of cash, the heir who keeps the flat hands their siblings something else — a garage space they also inherited, or shares in the family business — that part of the deal stops being covered by the unavoidable-excess exception. The tax authority treats it as a separate taxable transfer, at whatever Transfer Tax rate applies to the asset handed over, while the main property still gets the Modelo 600 Stamp Duty treatment.
For heirs living abroad who want to settle everything in a single deed, it pays to work out beforehand which part of the deal is cash and which is a swap of assets, because mixing the two raises the tax bill in ways that only show up once the self-assessment is filed.
Deadlines and Paperwork for Heirs Living Abroad
Modelo 600 is due within 30 working days of the date of the deed that extinguishes the co-ownership — not from the date the person who left the estate died: that clock already ran, or is running separately, for the inheritance itself under Modelo 650. An heir who lives outside Spain can sign the deed before a Spanish notary through a power of attorney, and then file the self-assessment online or through a representative.
Before the notary appointment, it helps to have ready:
- Each heir’s Spanish tax ID number (NIE or NIF), including whoever doesn’t live in Spain.
- The property’s land registry reference and an up-to-date reference value.
- Each heir’s bank details, to document that the compensation is paid in cash.
- A copy of the deed accepting the inheritance and the Modelo 650 already filed.
Filing late doesn’t cancel the deal, but it triggers surcharges and late-payment interest on the amount due, which grow the longer it takes to put it right.
Succession Pacts and Gifts: Why They Skip Modelo 600
Two other arrangements move property around before death and can look similar to this one without being taxed the same way. A succession pact (pacto sucesorio) — common in families with roots in regions of Spain such as Galicia, Catalonia, the Balearic Islands, Aragón, the Basque Country or Navarre, where local civil law allows them — is signed while the person who owns the assets is still alive, but Spain’s inheritance and gift tax law treats it as if it were an inheritance: it is settled with Modelo 650, not Modelo 600, and it gets added back into the later inheritance from the same person if less than four years pass between the two.
A straightforward gift, with no succession pact involved, doesn’t use Modelo 600 either: it is taxed under Spain’s Gift Tax, with its own form for someone who doesn’t live in Spain.
Gift Tax for Non-Residents and Form 651
Giving away during one’s lifetime what would otherwise be inherited — handing a family business’s shares, say, to a child who lives abroad — is part of the estate planning that international families use, and it is declared with Modelo 651 when the person receiving the gift doesn’t live in Spain. The deadline is the same as for Modelo 600: 30 working days from the date the gift is signed, and the tax authority requires naming a representative with an address in Spain.
What a Lifetime Gift Means for an Heir in the US, the UK or Ireland
The gift is taxed in Spain under the rules of whichever region the asset is located in, but whoever receives it can also owe something in their own country of residence. In the United States, the recipient doesn’t pay tax on receiving it — gift tax there falls on the person giving it away — but if they receive more than roughly $100,000 from the same foreign donor in a year, they must report it to the IRS on Form 3520, even though nothing is owed.
In the United Kingdom, a lifetime gift only escapes Inheritance Tax if the donor survives seven years from the date of the gift; if they don’t, it can still be taxed as part of their estate. Ireland taxes the recipient directly through Capital Acquisitions Tax, with thresholds that depend on how closely the giver and receiver are related — so the same gift can be tax-free in Spain and taxable on the other side of the Channel or the Atlantic if the two systems aren’t planned together.
Frequently Asked Questions About Modelo 600
Who pays Modelo 600 in an extinction of co-ownership?
The heir who keeps the whole asset and compensates the others in cash pays it: they are the one receiving the excess allotment and the one who self-assesses the tax. The siblings who get paid their share don’t file anything for this.
Do I need to file Modelo 600 if I live outside Spain?
Yes. Living abroad doesn’t exempt you from the obligation: you need a Spanish tax ID, a representative with a Spanish address if you don’t already have one, and you must file within the same 30 working days as any resident.
What happens if I don’t file Modelo 600 on time?
The tax is still owed, and the tax authority adds surcharges and late-payment interest on the outstanding amount, which increase the longer it takes. Sorting it out before a formal notice arrives is always cheaper than waiting for the authority to catch it.
Does a lifetime gift replace inheritance for tax purposes?
Not always: if the gift is signed as a succession pact, the tax authority treats it the same as an inheritance and settles it with Modelo 650. A plain gift is declared separately with Modelo 651, with no direct link to whatever is inherited later.